Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Radiant Heating and Cooling Panels
…34 unchanged lines
### Active chilled beams are induction devices that use ducted primary air to induce room air across a coil and are convection-dominant; if the dominant mechanism is inductive convection, the device is a chilled beam and is outside this standard. {note}
−### Radiant panels and chilled beams shall not be combined in a single specification section, because doing so produces bidding confusion and incorrect submittals. {note}
+### Radiant panels and chilled beams shall not be combined in a single specification section, because doing so produces bidding confusion and incorrect submittals.
## The following are excluded and are governed by the standards named: hydronic supply and return distribution piping, headers, risers, mains, and pipe insulation ([[sync/hydronic-piping]]); fan-coil and fan-driven terminal units ([[sync/fan-coil-units]], [[sync/terminal-heating-units]]); cabinet and horizontal unit heaters ([[sync/unit-heaters]]); heating and cooling coils within air-handling units ([[sync/heating-and-cooling-coils]]); and domestic hot water heating and storage ([[sync/plumbing-equipment]]). {note}
…169 unchanged lines
## Aluminum panels shall use an aluminum-compatible inhibited fluid; the loop pH shall be held between 7.0 and 8.5 for aluminum heat plates.
−### Standard HVAC glycol blends with high-pH inhibitor packages (pH above 9.0) corrode aluminum heat plates; an aluminum-compatible inhibited glycol shall be specified where aluminum panels are used. {note}
+### Standard HVAC glycol blends with high-pH inhibitor packages (pH above 9.0) corrode aluminum heat plates; an aluminum-compatible inhibited glycol shall be specified where aluminum panels are used.
# Panel Type and Configuration {toc}
…68 unchanged lines
```
−### Custom and field-applied finishes shall not reduce surface emissivity below the value used to establish the rated capacity. {note}
+### Custom and field-applied finishes shall not reduce surface emissivity below the value used to establish the rated capacity.
# Operating Mode and Water Temperatures {toc}
…13 unchanged lines
## Cooling supply water temperature shall be set above the space dew-point temperature with a minimum margin of 2°F to 3°F.
−## A cooling supply water temperature that is too low for the prevailing space dew point will cause condensation regardless of any downstream control; the design value is the first line of dew-point defense. {note}
−
```datasheet
label: Cooling Supply Water Temperature
…6 unchanged lines
```
+## A cooling supply water temperature that is too low for the prevailing space dew point will cause condensation regardless of any downstream control; the design value is the first line of dew-point defense. {note}
+
## Heating supply water temperature for ceiling and wall panels shall be selected for the design heating capacity within the panel pressure and temperature rating.
…88 unchanged lines
## Coverage shall be modeled against the reflected ceiling plan before the panel quantity is fixed, so that obstructions do not leave the space short of capacity.
−## In-floor systems shall confirm the maximum finish-floor R-value, because carpet, wood, or thick coverings reduce effective output and can overheat the slab. {note}
+## In-floor systems shall confirm the maximum finish-floor R-value, because carpet, wood, or thick coverings reduce effective output and can overheat the slab.
## Finish-floor covering over an in-floor radiant system shall not exceed R-1.0 for cooling service or R-2.0 for heating service.
…11 unchanged lines
# Controls and Dew-Point Protection {toc}
−## The control system shall maintain the panel surface above the space dew point under all operating conditions while delivering the design operative temperature. {note}
+## The control system shall maintain the panel surface above the space dew point under all operating conditions while delivering the design operative temperature.
## A dew-point protection method shall be provided for every cooling installation.
…9 unchanged lines
```
−## A dedicated DOAS or equivalent dehumidification source shall condition ventilation air below the panel surface temperature; without it, condensation on cooling panels is unavoidable in humid climates. {note}
+## A dedicated DOAS or equivalent dehumidification source shall condition ventilation air below the panel surface temperature; without it, condensation on cooling panels is unavoidable in humid climates.
## The controls sequence shall raise the cooling supply water temperature or close the chilled water supply when the space dew point approaches the panel surface temperature.
−## The dew-point interlock shall be a functional, tested element of the sequence of operation and not merely a setpoint note. {note}
+## The dew-point interlock shall be a functional, tested element of the sequence of operation and not merely a setpoint note.
```datasheet
…53 unchanged lines
# Sprinkler and Trade Coordination {toc}
−## Suspended radiant ceiling panels shall be coordinated with the fire sprinkler layout, because panels can obstruct standard sprinkler coverage. {note}
+## Suspended radiant ceiling panels shall be coordinated with the fire sprinkler layout, because panels can obstruct standard sprinkler coverage.
## Panel layout shall be coordinated with the sprinkler contractor early enough to add heads or apply listed obstructed-coverage rules under NFPA 13 or NFPA 13R as required.
…37 unchanged lines
## In-floor tubing shall maintain the design spacing and shall not be kinked or reduced in bore during installation.
−## Connections to the hydronic distribution shall be made with isolation valves and unions or flanges so that panels and manifolds can be removed for service. {note}
+## Connections to the hydronic distribution shall be made with isolation valves and unions or flanges so that panels and manifolds can be removed for service.
### Supply and return connections, balancing, and isolation devices shall be coordinated with the distribution piping standard [[sync/hydronic-piping]]. {note}
…52 unchanged lines
## Touch-up finish matching the factory panel finish shall be provided for field repair of minor surface damage.